A hydroplaning disk for safely projecting and skimming or skipping upon and across the surface of a body of water at the air-water interface for sport or recreation. The hydroplaning disk includes an ellipsoidal bottom surface, a top surface, and a deformable rim. The deformable rim deforms and returns to its original shape after absorbing impact energy. The top surface has an aerodynamic lip section with a leading edge portion, a peak portion, and a trailing edge portion. The aerodynamic lip se...

An aerodynamic and hydromechanical hydroplaning disc with a solid unitary body comprised of aggregated material. The disc is heavier than the water it displaces and non-floating. A series of longitudinally oriented (i.e., meridionally oriented, or north-south) discontinuities are provided only on the extreme latitudinal periphery of the rim adjacent to the top and bottom surfaces of the disc. Said discontinuities: exert a greater interfering effect on the airflow and waterflow around the circumf...

An aerodynamic and hydromechanical hydroplaning disc with a solid unitary body comprised of aggregated material. The disc is heavier than the water it displaces and non-floating. The peripheral edge of the disc is formed with a top to bottom curvature having a relatively smaller radius at the top than at the bottom of the disc which reduces air resistance and has a shape to increase the planing capacities as the disc strikes the water. The texture of the material is also significant in combinati...

A hydroplaning detecting system comprises wheel rotational speed detecting apparatus for detecting a wheel rotational speed of a wheel of a vehicle, reference pattern storage apparatus for previously storing a reference pattern of wheel rotational speed which varies over a period of time and is characteristic of hydroplaning generation, actual variation pattern extracting apparatus for extracting a actual variation in the wheel rotational speed over a period of time, and judgment apparatus for j...

A hydroplaning wing sailing craft comprising a single buoyant hull having mounted transversely across the hull a hydroplaning wing having forward sweep and inverted gull wing shape. The wing having a positive angle of incidence providing hydroplaning lift and buoyancy to counteract the heeling moment and thrust of the sail. Mounted atop the hull and the wing is a high aspect ratio sailing rig. Mounted to the stern of the hull is a biaxial control system permitting simultaneous control of the dir...

A hydroplaning detection system comprising AM specific frequency component extraction AM, which comprises a band-pass filter for extracting signal components PS in a main frequency band corresponding to the wheel rotation speed or the vehicle speed from wheel rotation speed signals, and a band-pass filters for respectively extracting signal components PL in other frequency bands, and AM determining the occurrence of hydroplaning based on the ratio PL/PS between the signal components PS in the ma...

An Anti-Hydroplaning Device System for a vehicle comprising a blower driven by the engine of the vehicle. A pair of hoses are connected to the blower and each terminate in a nozzle disposed immediately ahead of the traction portion of the vehicle wheel and pivot therewith, whereby surface water is dispersed prior to engagement by the vehicle tire.

A water displacer such as a plow or scraper in front of the tires of a vehicle to remove water from a flooded surface and expose the tires to a mere wet track condition. An air jet optionally may be used between the positive displacer and the tires.

A control system, such as a traction control system, for a wheel vehicle comprises a detecting section for detecting a hydroplaning condition by comparing a difference between a sensed undriven wheel speed, and a filter signal obtained by passing the sensed undriven wheel speed signal through a low-pass filter, and a controlling section for performing a control action adapted to the hydroplaning condition. This control system can detect the hydroplaning condition accurately, and control the vehi...

A permanently fixed metal trim tab for attachment in pair combinations to the aft end of a boat. Each trim tab comprising a downwardly extending aft edge. A top surface of each trim tab comprises an aft area which comprises striations which provide an anti-slip surface. The strength, position of attachment to the boat, and anti-slip surface permit use of the trim tab as a step for entry and exit to and from the boat. Each trim tab comprises a flange for attachment to a transom of the boat from c...